I'm still sorting through my fabric stash of natural and compost dyed fabrics trying to find a lost piece of pigment painted fabric. I still haven't found the piece I'm looking for, I may just have to repaint some fabric so that I can work on my project!
This piece, the red one, looks most like a nebula, it's from the Carter Smith stash of fabrics, the one below also has nebula potential but isn't as apparent in the photo.